Hi, I was recently getting to know one of my soon to be flatmates on Facebook and she's acting very confusing. We chatted a huge amount of 2-3 days staying up late and messaging each other, she kept sending pictures of herself and generally being very flirty. She's got a boyfriend but she didn't mention it to me until I said that it seems a little inappropriate and she said that he was away for that week.
We carried on messaging each other a lot, her friends were giggling at her because she kept smiling and being very happy every time she received at message from me. She said that I make her very happy and then she straight up said "I like you" and things like "I can't wait to meet you". Her boyfriend came back like 3 days ago and we haven't spoke since, I find the whole situation really confusing, I think maybe she was just bored with her boyfriend being away and just wanted someone to talk too? but then why would she message me whilst she was out with her friends?
I must admit I do have a little crush on her and I know it would be very stupid to act on it since we're going to be living together soon and she's in a relationship, I'm not going to log into Facebook for a week or so to distance myself from her and maybe the crush feelings will subside but I'm just generally confused about her behaviour. Any advice or help?
Do they actually matter?